CVE-2026-18403

MEDIUMPre-NVD 6.06.0—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.0 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4% (29th percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this weekElevated
6.0EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 6.0Exploit: Elevated riskExposed services: Not assessed

An upstream fix is merged but not yet released — mitigate (WAF / firewall / segmentation) until the release ships, then apply it.

LimeSurvey Community Edition 7.0.5 contains an authenticated SQL injection vulnerability in the Central Participant Database (CPDB) workflow that copies survey participant tokens to the central participant list.

CVSS v3
6.0
EG Score
6.0MEDIUMmedium confidence
EG Risk
43
EG Risk 43/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity60% × 45%
Exploitation40% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines until it ships, then apply the release.
EPSS PROB
0.4%
EPSS %ILE
29th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines until it ships, then apply the release.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 14, 2026

Last Modified

August 28, 2026

Advisory Details (3)

Auto-updated Aug 14, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
github_commit

commit 7735ce31cea1 (LimeSurvey/LimeSurvey)

Fix landed in LimeSurvey/LimeSurvey commit 7735ce31cea1 — awaiting tagged release

https://github.com/LimeSurvey/LimeSurvey/commit/7735ce31cea1cad087b0c8556cb65a1c09e29cbd
generic

GitHub - LimeSurvey/LimeSurvey: 🔥 LimeSurvey – A powerful, open-source survey platform. A free alternative to SurveyMonkey, Typeform, Qualtrics, and Google Forms, making it simple to create online surveys and forms with unmatched flexibility. · GitHub

https://github.com/LimeSurvey/LimeSurvey/
generic

LimeSurvey Community Edition 7.0.5 - Authenticated SQL injection in CPDB | Fluid Attacks

https://fluidattacks.com/es/advisories/rihanna

Vendor Advisories for CVE-2026-18403(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 13× in last 7d / 68× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 129 total refreshes for this CVE.

  1. 2026-10-04 23:21 UTCEPSS rescore
  2. 2026-10-04 22:12 UTCGHSA enrichment
  3. 2026-10-03 19:41 UTCEG score recompute
  4. 2026-10-03 19:41 UTCGHSA enrichment
  5. 2026-10-03 14:25 UTCEPSS rescore
  6. 2026-10-02 07:20 UTCEG score recompute
  7. 2026-10-02 07:20 UTCGHSA enrichment
  8. 2026-10-01 19:49 UTCEPSS rescore
  9. 2026-09-30 21:40 UTCEG score recompute
  10. 2026-09-30 21:40 UTCGHSA enrichment
  11. 2026-09-30 15:02 UTCEPSS rescore
  12. 2026-09-29 15:20 UTCEPSS rescore
  13. 2026-09-28 13:51 UTCEPSS rescore
  14. 2026-09-28 09:25 UTCEG score recompute
  15. 2026-09-28 09:25 UTCGHSA enrichment
  16. 2026-09-27 13:47 UTCEPSS rescore
  17. 2026-09-27 09:35 UTCEG score recompute
  18. 2026-09-27 09:35 UTCGHSA enrichment
  19. 2026-09-26 15:58 UTCEPSS rescore
  20. 2026-09-25 04:00 UTCEG score recompute
  21. 2026-09-25 04:00 UTCGHSA enrichment
  22. 2026-09-24 04:09 UTCEG score recompute
  23. 2026-09-24 04:09 UTCGHSA enrichment
  24. 2026-09-23 04:02 UTCEG score recompute
  25. 2026-09-23 04:02 UTCGHSA enrichment
Show 75 more
  1. 2026-09-22 04:11 UTCEG score recompute
  2. 2026-09-22 04:11 UTCGHSA enrichment
  3. 2026-09-21 04:17 UTCEG score recompute
  4. 2026-09-21 04:17 UTCGHSA enrichment
  5. 2026-09-20 04:26 UTCEG score recompute
  6. 2026-09-20 04:26 UTCGHSA enrichment
  7. 2026-09-19 04:35 UTCEG score recompute
  8. 2026-09-19 04:35 UTCGHSA enrichment
  9. 2026-09-18 19:27 UTCEPSS rescore
  10. 2026-09-18 04:44 UTCEG score recompute
  11. 2026-09-18 04:44 UTCGHSA enrichment
  12. 2026-09-17 04:53 UTCEG score recompute
  13. 2026-09-17 04:53 UTCGHSA enrichment
  14. 2026-09-16 14:07 UTCEPSS rescore
  15. 2026-09-16 05:14 UTCEPSS rescore
  16. 2026-09-16 05:02 UTCGHSA enrichment
  17. 2026-09-15 04:16 UTCEG score recompute
  18. 2026-09-15 04:16 UTCGHSA enrichment
  19. 2026-09-14 04:07 UTCEG score recompute
  20. 2026-09-14 04:07 UTCGHSA enrichment
  21. 2026-09-13 16:46 UTCEPSS rescore
  22. 2026-09-13 04:17 UTCEG score recompute
  23. 2026-09-13 04:17 UTCGHSA enrichment
  24. 2026-09-12 15:00 UTCEPSS rescore
  25. 2026-09-12 04:26 UTCEG score recompute
  26. 2026-09-12 04:26 UTCGHSA enrichment
  27. 2026-09-11 14:52 UTCEPSS rescore
  28. 2026-09-11 09:36 UTCEPSS rescore
  29. 2026-09-11 04:35 UTCEG score recompute
  30. 2026-09-11 04:35 UTCGHSA enrichment
  31. 2026-09-10 09:34 UTCEPSS rescore
  32. 2026-09-10 04:44 UTCGHSA enrichment
  33. 2026-09-09 04:49 UTCEG score recompute
  34. 2026-09-09 04:49 UTCGHSA enrichment
  35. 2026-09-08 22:00 UTCEPSS rescore
  36. 2026-09-08 00:37 UTCEG score recompute
  37. 2026-09-08 00:37 UTCGHSA enrichment
  38. 2026-09-07 16:01 UTCEPSS rescore
  39. 2026-09-07 00:46 UTCEG score recompute
  40. 2026-09-07 00:46 UTCGHSA enrichment
  41. 2026-09-06 13:47 UTCEPSS rescore
  42. 2026-09-06 00:16 UTCEG score recompute
  43. 2026-09-06 00:16 UTCGHSA enrichment
  44. 2026-09-05 00:25 UTCEG score recompute
  45. 2026-09-05 00:25 UTCGHSA enrichment
  46. 2026-09-04 05:06 UTCEPSS rescore
  47. 2026-09-03 23:07 UTCGHSA enrichment
  48. 2026-09-02 22:49 UTCEG score recompute
  49. 2026-09-02 22:48 UTCGHSA enrichment
  50. 2026-09-02 14:11 UTCEPSS rescore
  51. 2026-09-01 21:42 UTCEG score recompute
  52. 2026-09-01 21:42 UTCGHSA enrichment
  53. 2026-09-01 13:53 UTCEPSS rescore
  54. 2026-09-01 04:39 UTCEPSS rescore
  55. 2026-08-31 21:28 UTCEG score recompute
  56. 2026-08-31 21:28 UTCGHSA enrichment
  57. 2026-08-30 19:17 UTCEPSS rescore
  58. 2026-08-30 15:38 UTCEG score recompute
  59. 2026-08-30 15:38 UTCGHSA enrichment
  60. 2026-08-30 01:22 UTCEPSS rescore
  61. 2026-08-29 15:47 UTCEG score recompute
  62. 2026-08-29 15:47 UTCGHSA enrichment
  63. 2026-08-28 21:41 UTCEPSS rescore
  64. 2026-08-28 15:55 UTCGHSA enrichment
  65. 2026-08-27 19:30 UTCEG score recompute
  66. 2026-08-27 19:30 UTCGHSA enrichment
  67. 2026-08-27 14:25 UTCEPSS rescore
  68. 2026-08-26 18:42 UTCEG score recompute
  69. 2026-08-26 18:42 UTCGHSA enrichment
  70. 2026-08-26 14:46 UTCEPSS rescore
  71. 2026-08-25 18:40 UTCEG score recompute
  72. 2026-08-25 18:40 UTCGHSA enrichment
  73. 2026-08-25 13:48 UTCEPSS rescore
  74. 2026-08-24 18:48 UTCEG score recompute
  75. 2026-08-24 18:48 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-18403?
CVE-2026-18403 is a medium vulnerability published on August 14, 2026. LimeSurvey Community Edition 7.0.5 contains an authenticated SQL injection vulnerability in the Central Participant Database (CPDB) workflow that copies survey participant tokens to the central participant list.
When was CVE-2026-18403 disclosed?
CVE-2026-18403 was first published on August 14, 2026, with the most recent update on August 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-18403 actively exploited?
CVE-2026-18403 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (29th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-18403?
CVE-2026-18403 has a CVSS base score of 6.0 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-18403?
An upstream fix for CVE-2026-18403 has been merged but is not yet in a tagged release. Until it ships, restrict network exposure of the affected system or apply the vendor's mitigation, then update to the release that contains the fix. The vendor advisories EchelonGraph has for CVE-2026-18403 are linked in the Vendor Advisories panel on this page.

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